What are Pellets ?
Wood pellets are a standardised fuel. Every manufacturer must adhere to
certain conditions in order to enable flawless, energy-efficient heating. Pellets
are made from wood waste, from sawmills and planning workshops, as well as
from residue from forestry operations. These “starting products” are crushed,
dried, and pressed into Pellet “Fuel” without any bonding agent.
ENplus – Pellets
This new standard for pellets sets a new benchmark in the European pellet
market. The traceability of pellets is ensured thanks to the use of identification
numbers. The pellet manufacturers’ production facilities and manufacturing
processes are reviewed every year. A quality assurance system ensures the
pellets comply with the requirements of the new standard and that the conditions for trouble-free heating are
guaranteed.
Wood Pellet Specification according to ENplus – A1
Parameter Unit ENplus-A1
Diameter mm 6 (±1) (2)
Length mm 3.15 to 40 (3)
Bulk density kg/m³ ≥ 600
Calorific value MJ/kg ≥ 16.5
Water content Ma.-% ≤ 10
Fine fraction (< 3.15 mm) Ma.-% ≤ 1
Mechanical rigidity Ma.-% ≥ 97.5 (4)
Ash content Ma.-% (1) ≤ 0.7
Ash softening temperature (DT) °C ≥ 1200
Chlorine content Ma.-% (1) ≤ 0.02
Sulphur content Ma.-% (1) ≤ 0.03
Nitrogen content Ma.-% (1) ≤ 0.3
Copper content mg/kg (1) ≤ 10
Chrome content mg/kg (1) ≤ 10
Arsenic content mg/kg (1) ≤ 1
Cadmium content mg/kg (1) ≤ 0.5
Mercury content mg/kg (1) ≤ 0.1
Lead content mg/kg (1) ≤ 10
Nickel content mg/kg (1) ≤ 10
Zinc content mg/kg (1) ≤ 100
(1) in an anhydrous state
(2) Diameter must be specified
(3) a maximum of 1% of the pellets may be longer than 40 mm; max. length is 45 mm
(4) The limit value of ≥ 97.7 Ma.-% applies when conducting measurements with a Lignotester (internal control)
Pellet Storage
In order to guarantee problem free burning of the wood pellets, it is imperative to store the fuel as dry as
possible and free from impurities. Pellets should not be kept in sacks outdoors or stored in a manner where
they are exposed to the environment. This can lead to blockages in the screw conveyor - “screw stoppers” are
excluded from the warranty.
Note: Waste and liquids may not be burnt in the stove.
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